This will be used by drivers for MT76x2e, MT7603e and MT7628 Signed-off-by: Felix Fietkau <[email protected]> --- drivers/net/wireless/mediatek/mt76/debugfs.c | 72 ++++ drivers/net/wireless/mediatek/mt76/dma.c | 444 +++++++++++++++++++++++ drivers/net/wireless/mediatek/mt76/dma.h | 35 ++ drivers/net/wireless/mediatek/mt76/eeprom.c | 120 +++++++ drivers/net/wireless/mediatek/mt76/mac80211.c | 240 +++++++++++++ drivers/net/wireless/mediatek/mt76/mmio.c | 57 +++ drivers/net/wireless/mediatek/mt76/mt76.h | 303 ++++++++++++++++ drivers/net/wireless/mediatek/mt76/trace.c | 20 ++ drivers/net/wireless/mediatek/mt76/trace.h | 68 ++++ drivers/net/wireless/mediatek/mt76/tx.c | 499 ++++++++++++++++++++++++++ drivers/net/wireless/mediatek/mt76/util.c | 104 ++++++ drivers/net/wireless/mediatek/mt76/util.h | 104 ++++++ 12 files changed, 2066 insertions(+) create mode 100644 drivers/net/wireless/mediatek/mt76/debugfs.c create mode 100644 drivers/net/wireless/mediatek/mt76/dma.c create mode 100644 drivers/net/wireless/mediatek/mt76/dma.h create mode 100644 drivers/net/wireless/mediatek/mt76/eeprom.c create mode 100644 drivers/net/wireless/mediatek/mt76/mac80211.c create mode 100644 drivers/net/wireless/mediatek/mt76/mmio.c create mode 100644 drivers/net/wireless/mediatek/mt76/mt76.h create mode 100644 drivers/net/wireless/mediatek/mt76/trace.c create mode 100644 drivers/net/wireless/mediatek/mt76/trace.h create mode 100644 drivers/net/wireless/mediatek/mt76/tx.c create mode 100644 drivers/net/wireless/mediatek/mt76/util.c create mode 100644 drivers/net/wireless/mediatek/mt76/util.h
diff --git a/drivers/net/wireless/mediatek/mt76/debugfs.c b/drivers/net/wireless/mediatek/mt76/debugfs.c new file mode 100644 index 0000000..7587ff2 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/debugfs.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include "mt76.h" + +static int +mt76_reg_set(void *data, u64 val) +{ + struct mt76_dev *dev = data; + + dev->bus->wr(dev, dev->debugfs_reg, val); + return 0; +} + +static int +mt76_reg_get(void *data, u64 *val) +{ + struct mt76_dev *dev = data; + + *val = dev->bus->rr(dev, dev->debugfs_reg); + return 0; +} + +DEFINE_SIMPLE_ATTRIBUTE(fops_regval, mt76_reg_get, mt76_reg_set, "0x%08llx\n"); + +static int +mt76_queues_read(struct seq_file *s, void *data) +{ + struct mt76_dev *dev = dev_get_drvdata(s->private); + int i; + + for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) { + struct mt76_queue *q = &dev->q_tx[i]; + + if (!q->ndesc) + continue; + + seq_printf(s, + "%d: queued=%d head=%d tail=%d swq_queued=%d\n", + i, q->queued, q->head, q->tail, q->swq_queued); + } + + return 0; +} + +struct dentry *mt76_register_debugfs(struct mt76_dev *dev) +{ + struct dentry *dir; + + dir = debugfs_create_dir("mt76", dev->hw->wiphy->debugfsdir); + if (!dir) + return NULL; + + debugfs_create_u32("regidx", S_IRUSR | S_IWUSR, dir, &dev->debugfs_reg); + debugfs_create_file("regval", S_IRUSR | S_IWUSR, dir, dev, &fops_regval); + debugfs_create_blob("eeprom", S_IRUSR, dir, &dev->eeprom); + if (dev->otp.data) + debugfs_create_blob("otp", S_IRUSR, dir, &dev->otp); + debugfs_create_devm_seqfile(dev->dev, "queues", dir, mt76_queues_read); + + return dir; +} +EXPORT_SYMBOL_GPL(mt76_register_debugfs); diff --git a/drivers/net/wireless/mediatek/mt76/dma.c b/drivers/net/wireless/mediatek/mt76/dma.c new file mode 100644 index 0000000..b22dbd4 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/dma.c @@ -0,0 +1,444 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/dma-mapping.h> +#include "mt76.h" +#include "dma.h" + +#define DMA_DUMMY_TXWI ((void *) ~0) + +static int +mt76_dma_alloc_queue(struct mt76_dev *dev, struct mt76_queue *q) +{ + int size; + int i; + + spin_lock_init(&q->lock); + INIT_LIST_HEAD(&q->swq); + + size = q->ndesc * sizeof(struct mt76_desc); + q->desc = dmam_alloc_coherent(dev->dev, size, &q->desc_dma, GFP_KERNEL); + if (!q->desc) + return -ENOMEM; + + size = q->ndesc * sizeof(*q->entry); + q->entry = devm_kzalloc(dev->dev, size, GFP_KERNEL); + if (!q->entry) + return -ENOMEM; + + /* clear descriptors */ + for (i = 0; i < q->ndesc; i++) + q->desc[i].ctrl = cpu_to_le32(MT_DMA_CTL_DMA_DONE); + + iowrite32(q->desc_dma, &q->regs->desc_base); + iowrite32(0, &q->regs->cpu_idx); + iowrite32(0, &q->regs->dma_idx); + iowrite32(q->ndesc, &q->regs->ring_size); + + return 0; +} + +static int +mt76_dma_add_buf(struct mt76_dev *dev, struct mt76_queue *q, + struct mt76_queue_buf *buf, int nbufs, u32 info, + struct sk_buff *skb, void *txwi) +{ + struct mt76_desc *desc; + u32 ctrl; + int i, idx = -1; + + if (txwi) + q->entry[q->head].txwi = DMA_DUMMY_TXWI; + + for (i = 0; i < nbufs; i += 2, buf += 2) { + u32 buf0 = buf[0].addr, buf1 = 0; + + ctrl = MT76_SET(MT_DMA_CTL_SD_LEN0, buf[0].len); + if (i < nbufs - 1) { + buf1 = buf[1].addr; + ctrl |= MT76_SET(MT_DMA_CTL_SD_LEN1, buf[1].len); + } + + if (i == nbufs - 1) + ctrl |= MT_DMA_CTL_LAST_SEC0; + else if (i == nbufs - 2) + ctrl |= MT_DMA_CTL_LAST_SEC1; + + idx = q->head; + q->head = (q->head + 1) % q->ndesc; + + desc = &q->desc[idx]; + + ACCESS_ONCE(desc->buf0) = cpu_to_le32(buf0); + ACCESS_ONCE(desc->buf1) = cpu_to_le32(buf1); + ACCESS_ONCE(desc->info) = cpu_to_le32(info); + ACCESS_ONCE(desc->ctrl) = cpu_to_le32(ctrl); + + q->queued++; + } + + q->entry[idx].txwi = txwi; + q->entry[idx].skb = skb; + + return idx; +} + +static void +mt76_dma_tx_cleanup_idx(struct mt76_dev *dev, struct mt76_queue *q, int idx, + struct mt76_queue_entry *prev_e) +{ + struct mt76_queue_entry *e = &q->entry[idx]; + __le32 __ctrl = ACCESS_ONCE(q->desc[idx].ctrl); + u32 ctrl = le32_to_cpu(__ctrl); + + if (!e->txwi || !e->skb) { + __le32 addr = ACCESS_ONCE(q->desc[idx].buf0); + u32 len = MT76_GET(MT_DMA_CTL_SD_LEN0, ctrl); + dma_unmap_single(dev->dev, le32_to_cpu(addr), len, + DMA_TO_DEVICE); + } + + if (!(ctrl & MT_DMA_CTL_LAST_SEC0)) { + __le32 addr = ACCESS_ONCE(q->desc[idx].buf1); + u32 len = MT76_GET(MT_DMA_CTL_SD_LEN1, ctrl); + dma_unmap_single(dev->dev, le32_to_cpu(addr), len, + DMA_TO_DEVICE); + } + + if (e->txwi == DMA_DUMMY_TXWI) + e->txwi = NULL; + + *prev_e = *e; + memset(e, 0, sizeof(*e)); +} + +static void +mt76_dma_sync_idx(struct mt76_dev *dev, struct mt76_queue *q) +{ + q->tail = q->head = ioread32(&q->regs->dma_idx); + iowrite32(q->head, &q->regs->cpu_idx); +} + +static void +mt76_dma_tx_cleanup(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush) +{ + struct mt76_queue *q = &dev->q_tx[qid]; + struct mt76_queue_entry entry; + bool wake = false; + int last; + + if (!q->ndesc) + return; + + spin_lock_bh(&q->lock); + if (flush) + last = -1; + else + last = ioread32(&q->regs->dma_idx); + + while (q->queued && q->tail != last) { + mt76_dma_tx_cleanup_idx(dev, q, q->tail, &entry); + if (entry.schedule) + q->swq_queued--; + + if (entry.skb) + dev->drv->tx_complete_skb(dev, q, &entry, flush); + + if (entry.txwi) { + mt76_put_txwi(dev, entry.txwi); + wake = true; + } + + q->tail = (q->tail + 1) % q->ndesc; + q->queued--; + + if (!flush && q->tail == last) + last = ioread32(&q->regs->dma_idx); + } + + if (!flush) + mt76_txq_schedule(dev, q); + else + mt76_dma_sync_idx(dev, q); + + wake = wake && qid < IEEE80211_NUM_ACS && q->queued < q->ndesc - 8; + spin_unlock_bh(&q->lock); + + if (wake) + ieee80211_wake_queue(dev->hw, qid); +} + +static void * +mt76_dma_get_buf(struct mt76_dev *dev, struct mt76_queue *q, int idx, + int *len, u32 *info, bool *more) +{ + struct mt76_queue_entry *e = &q->entry[idx]; + struct mt76_desc *desc = &q->desc[idx]; + dma_addr_t buf_addr; + void *buf = e->buf; + int buf_len = SKB_WITH_OVERHEAD(q->buf_size); + + buf_addr = ACCESS_ONCE(desc->buf0); + if (len) { + u32 ctl = ACCESS_ONCE(desc->ctrl); + *len = MT76_GET(MT_DMA_CTL_SD_LEN0, ctl); + *more = !(ctl & MT_DMA_CTL_LAST_SEC0); + } + + if (info) + *info = le32_to_cpu(desc->info); + + dma_unmap_single(dev->dev, buf_addr, buf_len, DMA_FROM_DEVICE); + e->buf = NULL; + + return buf; +} + +static void * +mt76_dma_dequeue(struct mt76_dev *dev, struct mt76_queue *q, bool flush, + int *len, u32 *info, bool *more) +{ + int idx = q->tail; + + *more = false; + if (!q->queued) + return NULL; + + if (!flush && !(q->desc[idx].ctrl & cpu_to_le32(MT_DMA_CTL_DMA_DONE))) + return NULL; + + q->tail = (q->tail + 1) % q->ndesc; + q->queued--; + + return mt76_dma_get_buf(dev, q, idx, len, info, more); +} + +static void +mt76_dma_kick_queue(struct mt76_dev *dev, struct mt76_queue *q) +{ + iowrite32(q->head, &q->regs->cpu_idx); +} + +static int +mt76_dma_rx_fill(struct mt76_dev *dev, struct mt76_queue *q, bool napi) +{ + dma_addr_t addr; + void *buf; + int frames = 0; + int len = SKB_WITH_OVERHEAD(q->buf_size); + int offset = q->buf_offset; + int idx; + void *(*alloc)(unsigned int fragsz); + + if (napi) + alloc = napi_alloc_frag; + else + alloc = netdev_alloc_frag; + + spin_lock_bh(&q->lock); + + while (q->queued < q->ndesc - 1) { + struct mt76_queue_buf qbuf; + + buf = alloc(q->buf_size); + if (!buf) + break; + + addr = dma_map_single(dev->dev, buf, len, DMA_FROM_DEVICE); + if (dma_mapping_error(dev->dev, addr)) { + skb_free_frag(buf); + break; + } + + qbuf.addr = addr + offset; + qbuf.len = len - offset; + idx = mt76_dma_add_buf(dev, q, &qbuf, 1, 0, buf, NULL); + frames++; + } + + if (frames) + mt76_dma_kick_queue(dev, q); + + spin_unlock_bh(&q->lock); + + return frames; +} + +static void +mt76_dma_rx_cleanup(struct mt76_dev *dev, struct mt76_queue *q) +{ + void *buf; + bool more; + + spin_lock_bh(&q->lock); + do { + buf = mt76_dma_dequeue(dev, q, true, NULL, NULL, &more); + if (!buf) + break; + + skb_free_frag(buf); + } while (1); + spin_unlock_bh(&q->lock); +} + +static void +mt76_dma_rx_reset(struct mt76_dev *dev, enum mt76_rxq_id qid) +{ + struct mt76_queue *q = &dev->q_rx[qid]; + int i; + + for (i = 0; i < q->ndesc; i++) + q->desc[i].ctrl &= ~cpu_to_le32(MT_DMA_CTL_DMA_DONE); + + mt76_dma_rx_cleanup(dev, q); + mt76_dma_sync_idx(dev, q); + mt76_dma_rx_fill(dev, q, false); +} + +static void +mt76_add_fragment(struct mt76_dev *dev, struct mt76_queue *q, void *data, + int len, bool more) +{ + struct page *page = virt_to_head_page(data); + int offset = data - page_address(page); + struct sk_buff *skb = q->rx_head; + + offset += q->buf_offset; + skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, offset, len, + q->buf_size); + + if (more) + return; + + q->rx_head = NULL; + dev->drv->rx_skb(dev, q - dev->q_rx, skb); +} + +static int +mt76_dma_rx_process(struct mt76_dev *dev, struct mt76_queue *q, int budget) +{ + struct sk_buff *skb; + unsigned char *data; + int len; + int done = 0; + bool more; + + while (done < budget) { + u32 info; + + data = mt76_dma_dequeue(dev, q, false, &len, &info, &more); + if (!data) + break; + + if (q->rx_head) { + mt76_add_fragment(dev, q, data, len, more); + continue; + } + + skb = build_skb(data, q->buf_size); + if (!skb) { + skb_free_frag(data); + continue; + } + + skb_reserve(skb, q->buf_offset); + if (skb->tail + len > skb->end) { + dev_kfree_skb(skb); + continue; + } + + if (q == &dev->q_rx[MT_RXQ_MCU]) { + u32 * rxfce = (u32 *) skb->cb; + *rxfce = info; + } + + __skb_put(skb, len); + done++; + + if (more) { + q->rx_head = skb; + continue; + } + + dev->drv->rx_skb(dev, q - dev->q_rx, skb); + } + + mt76_dma_rx_fill(dev, q, true); + return done; +} + +static int +mt76_dma_rx_poll(struct napi_struct *napi, int budget) +{ + struct mt76_dev *dev; + int qid, done; + + dev = container_of(napi->dev, struct mt76_dev, napi_dev); + qid = napi - dev->napi; + + done = mt76_dma_rx_process(dev, &dev->q_rx[qid], budget); + if (done < budget) { + napi_complete(napi); + dev->drv->rx_poll_complete(dev, qid); + } + mt76_rx_complete(dev, qid); + + return done; +} + +static int +mt76_dma_init(struct mt76_dev *dev) +{ + int i; + + init_dummy_netdev(&dev->napi_dev); + + for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++) { + netif_napi_add(&dev->napi_dev, &dev->napi[i], mt76_dma_rx_poll, 64); + mt76_dma_rx_fill(dev, &dev->q_rx[i], false); + skb_queue_head_init(&dev->rx_skb[i]); + napi_enable(&dev->napi[i]); + } + + return 0; +} + +static const struct mt76_queue_ops mt76_dma_ops = { + .init = mt76_dma_init, + .alloc = mt76_dma_alloc_queue, + .add_buf = mt76_dma_add_buf, + .tx_cleanup = mt76_dma_tx_cleanup, + .rx_reset = mt76_dma_rx_reset, + .kick = mt76_dma_kick_queue, +}; + +int mt76_dma_attach(struct mt76_dev *dev) +{ + dev->queue_ops = &mt76_dma_ops; + return 0; +} +EXPORT_SYMBOL_GPL(mt76_dma_attach); + +void mt76_dma_cleanup(struct mt76_dev *dev) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(dev->q_tx); i++) + mt76_dma_tx_cleanup(dev, i, true); + + for (i = 0; i < ARRAY_SIZE(dev->q_rx); i++) { + netif_napi_del(&dev->napi[i]); + mt76_dma_rx_cleanup(dev, &dev->q_rx[i]); + } +} +EXPORT_SYMBOL_GPL(mt76_dma_cleanup); diff --git a/drivers/net/wireless/mediatek/mt76/dma.h b/drivers/net/wireless/mediatek/mt76/dma.h new file mode 100644 index 0000000..4a6e783 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/dma.h @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __MT76_DMA_H +#define __MT76_DMA_H + +#define MT_RING_SIZE 0x10 + +#define MT_DMA_CTL_SD_LEN1 GENMASK(13, 0) +#define MT_DMA_CTL_LAST_SEC1 BIT(14) +#define MT_DMA_CTL_BURST BIT(15) +#define MT_DMA_CTL_SD_LEN0 GENMASK(29, 16) +#define MT_DMA_CTL_LAST_SEC0 BIT(30) +#define MT_DMA_CTL_DMA_DONE BIT(31) + +struct mt76_desc { + __le32 buf0; + __le32 ctrl; + __le32 buf1; + __le32 info; +} __packed __aligned(4); + +int mt76_dma_attach(struct mt76_dev *dev); +void mt76_dma_cleanup(struct mt76_dev *dev); + +#endif diff --git a/drivers/net/wireless/mediatek/mt76/eeprom.c b/drivers/net/wireless/mediatek/mt76/eeprom.c new file mode 100644 index 0000000..3ea7da7 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/eeprom.c @@ -0,0 +1,120 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <linux/of.h> +#include <linux/of_net.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> +#include <linux/etherdevice.h> +#include "mt76.h" + +static int +mt76_get_of_eeprom(struct mt76_dev *dev, int len) +{ +#ifdef CONFIG_OF + struct device_node *np = dev->dev->of_node; + struct mtd_info *mtd; + const __be32 *list; + const char *part; + phandle phandle; + int offset = 0; + int size; + size_t retlen; + int ret; + + if (!np) + return -ENOENT; + + list = of_get_property(np, "mediatek,mtd-eeprom", &size); + if (!list) + return -ENOENT; + + phandle = be32_to_cpup(list++); + if (!phandle) + return -ENOENT; + + np = of_find_node_by_phandle(phandle); + if (!np) + return -EINVAL; + + part = of_get_property(np, "label", NULL); + if (!part) + part = np->name; + + mtd = get_mtd_device_nm(part); + if (IS_ERR(mtd)) + return PTR_ERR(mtd); + + if (size <= sizeof(*list)) + return -EINVAL; + + offset = be32_to_cpup(list); + ret = mtd_read(mtd, offset, len, &retlen, dev->eeprom.data); + put_mtd_device(mtd); + if (ret) + return ret; + + if (retlen < len) + return -EINVAL; + + return 0; +#else + return -ENOENT; +#endif +} + +void +mt76_eeprom_override(struct mt76_dev *dev) +{ +#ifdef CONFIG_OF + struct device_node *np = dev->dev->of_node; + const __be32 *val; + const u8 *mac; + int size; + + if (!np) + return; + + val = of_get_property(np, "mediatek,2ghz", &size); + if (val) + dev->cap.has_2ghz = be32_to_cpup(val); + + val = of_get_property(np, "mediatek,5ghz", &size); + if (val) + dev->cap.has_5ghz = be32_to_cpup(val); + + mac = of_get_mac_address(np); + if (mac) + memcpy(dev->macaddr, mac, ETH_ALEN); +#endif + + if (!is_valid_ether_addr(dev->macaddr)) { + eth_random_addr(dev->macaddr); + dev_printk(KERN_INFO, dev->dev, + "Invalid MAC address, using random address %pM\n", + dev->macaddr); + } + +} +EXPORT_SYMBOL_GPL(mt76_eeprom_override); + +int +mt76_eeprom_init(struct mt76_dev *dev, int len) +{ + dev->eeprom.size = len; + dev->eeprom.data = devm_kzalloc(dev->dev, len, GFP_KERNEL); + if (!dev->eeprom.data) + return -ENOMEM; + + return !mt76_get_of_eeprom(dev, len); +} +EXPORT_SYMBOL_GPL(mt76_eeprom_init); diff --git a/drivers/net/wireless/mediatek/mt76/mac80211.c b/drivers/net/wireless/mediatek/mt76/mac80211.c new file mode 100644 index 0000000..7aae2db --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mac80211.c @@ -0,0 +1,240 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include "mt76.h" + +#define CHAN2G(_idx, _freq) { \ + .band = IEEE80211_BAND_2GHZ, \ + .center_freq = (_freq), \ + .hw_value = (_idx), \ + .max_power = 30, \ +} + +#define CHAN5G(_idx, _freq) { \ + .band = IEEE80211_BAND_5GHZ, \ + .center_freq = (_freq), \ + .hw_value = (_idx), \ + .max_power = 30, \ +} + +static const struct ieee80211_channel mt76_channels_2ghz[] = { + CHAN2G(1, 2412), + CHAN2G(2, 2417), + CHAN2G(3, 2422), + CHAN2G(4, 2427), + CHAN2G(5, 2432), + CHAN2G(6, 2437), + CHAN2G(7, 2442), + CHAN2G(8, 2447), + CHAN2G(9, 2452), + CHAN2G(10, 2457), + CHAN2G(11, 2462), + CHAN2G(12, 2467), + CHAN2G(13, 2472), + CHAN2G(14, 2484), +}; + +static const struct ieee80211_channel mt76_channels_5ghz[] = { + CHAN5G(36, 5180), + CHAN5G(40, 5200), + CHAN5G(44, 5220), + CHAN5G(48, 5240), + + CHAN5G(52, 5260), + CHAN5G(56, 5280), + CHAN5G(60, 5300), + CHAN5G(64, 5320), + + CHAN5G(100, 5500), + CHAN5G(104, 5520), + CHAN5G(108, 5540), + CHAN5G(112, 5560), + CHAN5G(116, 5580), + CHAN5G(120, 5600), + CHAN5G(124, 5620), + CHAN5G(128, 5640), + CHAN5G(132, 5660), + CHAN5G(136, 5680), + CHAN5G(140, 5700), + + CHAN5G(149, 5745), + CHAN5G(153, 5765), + CHAN5G(157, 5785), + CHAN5G(161, 5805), + CHAN5G(165, 5825), +}; + +static int +mt76_init_sband(struct mt76_dev *dev, struct ieee80211_supported_band *sband, + const struct ieee80211_channel *chan, int n_chan, + struct ieee80211_rate *rates, int n_rates, bool vht) +{ + struct ieee80211_sta_ht_cap *ht_cap; + struct ieee80211_sta_vht_cap *vht_cap; + void *chanlist; + u16 mcs_map; + int size; + + size = n_chan * sizeof(*chan); + chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL); + if (!chanlist) + return -ENOMEM; + + sband->channels = chanlist; + sband->n_channels = n_chan; + sband->bitrates = rates; + sband->n_bitrates = n_rates; + + ht_cap = &sband->ht_cap; + ht_cap->ht_supported = true; + ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 | + IEEE80211_HT_CAP_GRN_FLD | + IEEE80211_HT_CAP_SGI_20 | + IEEE80211_HT_CAP_SGI_40 | + IEEE80211_HT_CAP_TX_STBC | + (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT); + + ht_cap->mcs.rx_mask[0] = 0xff; + ht_cap->mcs.rx_mask[1] = 0xff; + ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; + ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; + ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; + + if (!vht) + return 0; + + vht_cap = &sband->vht_cap; + vht_cap->vht_supported = true; + + mcs_map = (IEEE80211_VHT_MCS_SUPPORT_0_9 << (0 * 2)) | + (IEEE80211_VHT_MCS_SUPPORT_0_9 << (1 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (2 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (3 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (4 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (5 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (6 * 2)) | + (IEEE80211_VHT_MCS_NOT_SUPPORTED << (7 * 2)); + + vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map); + vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map); + vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC | + IEEE80211_VHT_CAP_TXSTBC | + IEEE80211_VHT_CAP_RXSTBC_1 | + IEEE80211_VHT_CAP_SHORT_GI_80; + + return 0; +} + +static int +mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates, + int n_rates) +{ + dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &dev->sband_2g; + + return mt76_init_sband(dev, &dev->sband_2g, + mt76_channels_2ghz, + ARRAY_SIZE(mt76_channels_2ghz), + rates, n_rates, false); +} + +static int +mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates, + int n_rates, bool vht) +{ + dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &dev->sband_5g; + + return mt76_init_sband(dev, &dev->sband_5g, + mt76_channels_5ghz, + ARRAY_SIZE(mt76_channels_5ghz), + rates, n_rates, vht); +} + +int mt76_register_device(struct mt76_dev *dev, bool vht, + struct ieee80211_rate *rates, int n_rates) +{ + struct ieee80211_hw *hw = dev->hw; + struct wiphy *wiphy = hw->wiphy; + int ret; + + dev_set_drvdata(dev->dev, dev); + + spin_lock_init(&dev->lock); + INIT_LIST_HEAD(&dev->txwi_cache); + + SET_IEEE80211_DEV(hw, dev->dev); + SET_IEEE80211_PERM_ADDR(hw, dev->macaddr); + + wiphy->interface_modes = + BIT(NL80211_IFTYPE_STATION) | + BIT(NL80211_IFTYPE_AP) | +#ifdef CONFIG_MAC80211_MESH + BIT(NL80211_IFTYPE_MESH_POINT) | +#endif + BIT(NL80211_IFTYPE_ADHOC); + + wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR; + + hw->txq_data_size = sizeof(struct mt76_txq); + + ieee80211_hw_set(hw, SIGNAL_DBM); + ieee80211_hw_set(hw, PS_NULLFUNC_STACK); + ieee80211_hw_set(hw, SUPPORTS_HT_CCK_RATES); + ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); + ieee80211_hw_set(hw, AMPDU_AGGREGATION); + ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); + ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); + ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); + ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); + + if (dev->cap.has_2ghz) { + ret = mt76_init_sband_2g(dev, rates, n_rates); + if (ret) + return ret; + } + + if (dev->cap.has_5ghz) { + ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht); + if (ret) + return ret; + } + + return ieee80211_register_hw(hw); +} +EXPORT_SYMBOL_GPL(mt76_register_device); + +void mt76_unregister_device(struct mt76_dev *dev) +{ + struct ieee80211_hw *hw = dev->hw; + + ieee80211_unregister_hw(hw); + mt76_tx_free(dev); +} +EXPORT_SYMBOL_GPL(mt76_unregister_device); + +void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb) +{ + if (!test_bit(MT76_STATE_RUNNING, &dev->state)) { + dev_kfree_skb(skb); + return; + } + + __skb_queue_tail(&dev->rx_skb[q], skb); +} +EXPORT_SYMBOL_GPL(mt76_rx); + +void mt76_rx_complete(struct mt76_dev *dev, enum mt76_rxq_id q) +{ + struct sk_buff *skb; + + while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) + ieee80211_rx_napi(dev->hw, skb, &dev->napi[q]); +} diff --git a/drivers/net/wireless/mediatek/mt76/mmio.c b/drivers/net/wireless/mediatek/mt76/mmio.c new file mode 100644 index 0000000..855cb3c --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mmio.c @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "mt76.h" +#include "trace.h" + +static u32 mt76_mmio_rr(struct mt76_dev *dev, u32 offset) +{ + u32 val; + + val = ioread32(dev->regs + offset); + trace_reg_read(dev, offset, val); + + return val; +} + +static void mt76_mmio_wr(struct mt76_dev *dev, u32 offset, u32 val) +{ + trace_reg_write(dev, offset, val); + iowrite32(val, dev->regs + offset); +} + +static u32 mt76_mmio_rmw(struct mt76_dev *dev, u32 offset, u32 mask, u32 val) +{ + val |= mt76_mmio_rr(dev, offset) & ~mask; + mt76_mmio_wr(dev, offset, val); + return val; +} + +static void mt76_mmio_copy(struct mt76_dev *dev, u32 offset, const void *data, int len) +{ + __iowrite32_copy(dev->regs + offset, data, len >> 2); +} + +void mt76_mmio_init(struct mt76_dev *dev, void __iomem *regs) +{ + static const struct mt76_bus_ops mt76_mmio_ops = { + .rr = mt76_mmio_rr, + .rmw = mt76_mmio_rmw, + .wr = mt76_mmio_wr, + .copy = mt76_mmio_copy, + }; + + dev->bus = &mt76_mmio_ops; + dev->regs = regs; +} +EXPORT_SYMBOL_GPL(mt76_mmio_init); diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h new file mode 100644 index 0000000..1a54331 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt76.h @@ -0,0 +1,303 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __MT76_H +#define __MT76_H + +#include <linux/kernel.h> +#include <linux/io.h> +#include <linux/spinlock.h> +#include <linux/skbuff.h> +#include <net/mac80211.h> +#include "util.h" + +#define MT_RX_RING_SIZE 128 +#define MT_TX_RING_SIZE 256 +#define MT_MCU_RING_SIZE 32 +#define MT_RX_BUF_SIZE 2048 + +struct mt76_dev; + +struct mt76_bus_ops { + u32 (*rr)(struct mt76_dev *dev, u32 offset); + void (*wr)(struct mt76_dev *dev, u32 offset, u32 val); + u32 (*rmw)(struct mt76_dev *dev, u32 offset, u32 mask, u32 val); + void (*copy)(struct mt76_dev *dev, u32 offset, const void *data, int len); +}; + +enum mt76_txq_id { + MT_TXQ_VO = IEEE80211_AC_VO, + MT_TXQ_VI = IEEE80211_AC_VI, + MT_TXQ_BE = IEEE80211_AC_BE, + MT_TXQ_BK = IEEE80211_AC_BK, + MT_TXQ_PSD, + MT_TXQ_MCU, + MT_TXQ_BEACON, + MT_TXQ_CAB, + __MT_TXQ_MAX +}; + +enum mt76_rxq_id { + MT_RXQ_MAIN, + MT_RXQ_MCU, + __MT_RXQ_MAX +}; + +struct mt76_queue_buf { + dma_addr_t addr; + int len; +}; + +struct mt76_queue_entry { + union { + void *buf; + struct sk_buff *skb; + }; + struct mt76_txwi_cache *txwi; + bool schedule; +}; + +struct mt76_queue_regs { + u32 desc_base; + u32 ring_size; + u32 cpu_idx; + u32 dma_idx; +} __packed __aligned(4); + +struct mt76_queue { + struct mt76_queue_regs __iomem *regs; + + spinlock_t lock; + struct mt76_queue_entry *entry; + struct mt76_desc *desc; + + struct list_head swq; + int swq_queued; + + u16 head; + u16 tail; + int ndesc; + int queued; + int buf_size; + + u8 buf_offset; + u8 hw_idx; + + dma_addr_t desc_dma; + struct sk_buff *rx_head; +}; + +struct mt76_queue_ops { + int (*init)(struct mt76_dev *dev); + + int (*alloc)(struct mt76_dev *dev, struct mt76_queue *q); + + int (*add_buf)(struct mt76_dev *dev, struct mt76_queue *q, + struct mt76_queue_buf *buf, int nbufs, u32 info, + struct sk_buff *skb, void *txwi); + + void *(*dequeue)(struct mt76_dev *dev, struct mt76_queue *q, bool flush, + int *len, u32 *info, bool *more); + + void (*rx_reset)(struct mt76_dev *dev, enum mt76_rxq_id qid); + + void (*tx_cleanup)(struct mt76_dev *dev, enum mt76_txq_id qid, bool flush); + + void (*kick)(struct mt76_dev *dev, struct mt76_queue *q); +}; + +struct mt76_wcid { + u8 idx; + u8 hw_key_idx; + + __le16 tx_rate; + bool tx_rate_set; + u8 tx_rate_nss; +}; + +struct mt76_txq { + struct list_head list; + struct mt76_queue *hwq; + struct mt76_wcid *wcid; + + struct sk_buff_head retry_q; + + u16 agg_ssn; + bool send_bar; + bool aggr; +}; + +struct mt76_txwi_cache { + u32 txwi[8]; + dma_addr_t dma_addr; + struct list_head list; +}; + +enum { + MT76_STATE_INITIALIZED, + MT76_STATE_RUNNING, + MT76_SCANNING, + MT76_RESET, +}; + +struct mt76_hw_cap { + bool has_2ghz; + bool has_5ghz; +}; + +struct mt76_driver_ops { + u16 txwi_size; + + int (*tx_prepare_skb)(struct mt76_dev *dev, void *txwi_ptr, + struct sk_buff *skb, struct mt76_queue *q, + struct mt76_wcid *wcid, + struct ieee80211_sta *sta, u32 *tx_info); + + void (*tx_complete_skb)(struct mt76_dev *dev, struct mt76_queue *q, + struct mt76_queue_entry *e, bool flush); + + void (*rx_skb)(struct mt76_dev *dev, enum mt76_rxq_id q, + struct sk_buff *skb); + + void (*rx_poll_complete)(struct mt76_dev *dev, enum mt76_rxq_id q); +}; + +struct mt76_dev { + struct ieee80211_hw *hw; + + spinlock_t lock; + const struct mt76_bus_ops *bus; + const struct mt76_driver_ops *drv; + void __iomem *regs; + struct device *dev; + + struct net_device napi_dev; + struct napi_struct napi[__MT_RXQ_MAX]; + struct sk_buff_head rx_skb[__MT_RXQ_MAX]; + + struct list_head txwi_cache; + struct mt76_queue q_tx[__MT_TXQ_MAX]; + struct mt76_queue q_rx[__MT_RXQ_MAX]; + const struct mt76_queue_ops *queue_ops; + + u8 macaddr[ETH_ALEN]; + u32 rev; + unsigned long state; + + struct ieee80211_supported_band sband_2g; + struct ieee80211_supported_band sband_5g; + struct debugfs_blob_wrapper eeprom; + struct debugfs_blob_wrapper otp; + struct mt76_hw_cap cap; + + u32 debugfs_reg; +}; + +enum mt76_phy_type { + MT_PHY_TYPE_CCK, + MT_PHY_TYPE_OFDM, + MT_PHY_TYPE_HT, + MT_PHY_TYPE_HT_GF, + MT_PHY_TYPE_VHT, +}; + +#define mt76_rr(dev, ...) (dev)->mt76.bus->rr(&((dev)->mt76), __VA_ARGS__) +#define mt76_wr(dev, ...) (dev)->mt76.bus->wr(&((dev)->mt76), __VA_ARGS__) +#define mt76_rmw(dev, ...) (dev)->mt76.bus->rmw(&((dev)->mt76), __VA_ARGS__) +#define mt76_wr_copy(dev, ...) (dev)->mt76.bus->copy(&((dev)->mt76), __VA_ARGS__) + +#define mt76_set(dev, offset, val) mt76_rmw(dev, offset, 0, val) +#define mt76_clear(dev, offset, val) mt76_rmw(dev, offset, val, 0) + +#define mt76_get_field(_dev, _reg, _field) \ + MT76_GET(_field, mt76_rr(dev, _reg)) + +#define mt76_rmw_field(_dev, _reg, _field, _val) \ + mt76_rmw(_dev, _reg, _field, MT76_SET(_field, _val)) + +#define mt76_hw(dev) (dev)->mt76.hw + +bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, + int timeout); + +#define mt76_poll(dev, ...) __mt76_poll(&((dev)->mt76), __VA_ARGS__) + +bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, + int timeout); + +#define mt76_poll_msec(dev, ...) __mt76_poll_msec(&((dev)->mt76), __VA_ARGS__) + +void mt76_mmio_init(struct mt76_dev *dev, void __iomem *regs); + +static inline u16 mt76_chip(struct mt76_dev *dev) +{ + return dev->rev >> 16; +} + +static inline u16 mt76_rev(struct mt76_dev *dev) +{ + return dev->rev & 0xffff; +} + +#define mt76xx_chip(dev) mt76_chip(&((dev)->mt76)) +#define mt76xx_rev(dev) mt76_rev(&((dev)->mt76)) + +#define mt76_init_queues(dev) (dev)->mt76.queue_ops->init(&((dev)->mt76)) +#define mt76_queue_alloc(dev, ...) (dev)->mt76.queue_ops->alloc(&((dev)->mt76), __VA_ARGS__) +#define mt76_queue_add_buf(dev, ...) (dev)->mt76.queue_ops->add_buf(&((dev)->mt76), __VA_ARGS__) +#define mt76_queue_rx_reset(dev, ...) (dev)->mt76.queue_ops->rx_reset(&((dev)->mt76), __VA_ARGS__) +#define mt76_queue_tx_cleanup(dev, ...) (dev)->mt76.queue_ops->tx_cleanup(&((dev)->mt76), __VA_ARGS__) +#define mt76_queue_kick(dev, ...) (dev)->mt76.queue_ops->kick(&((dev)->mt76), __VA_ARGS__) + +int mt76_register_device(struct mt76_dev *dev, bool vht, + struct ieee80211_rate *rates, int n_rates); +void mt76_unregister_device(struct mt76_dev *dev); + +struct dentry *mt76_register_debugfs(struct mt76_dev *dev); + +int mt76_eeprom_init(struct mt76_dev *dev, int len); +void mt76_eeprom_override(struct mt76_dev *dev); + +static inline struct ieee80211_txq * +mtxq_to_txq(struct mt76_txq *mtxq) +{ + void *ptr = mtxq; + return container_of(ptr, struct ieee80211_txq, drv_priv); +} + +int mt76_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, + struct sk_buff *skb, struct mt76_wcid *wcid, + struct ieee80211_sta *sta); + +void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb); +void mt76_tx(struct mt76_dev *dev, struct ieee80211_sta *sta, + struct mt76_wcid *wcid, struct sk_buff *skb); +void mt76_txq_init(struct mt76_dev *dev, struct ieee80211_txq *txq); +void mt76_txq_remove(struct mt76_dev *dev, struct ieee80211_txq *txq); +void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq); +void mt76_stop_tx_queues(struct mt76_dev *dev, struct ieee80211_sta *sta, + bool send_bar); +void mt76_txq_schedule(struct mt76_dev *dev, struct mt76_queue *hwq); +void mt76_txq_schedule_all(struct mt76_dev *dev); +void mt76_release_buffered_frames(struct ieee80211_hw *hw, + struct ieee80211_sta *sta, + u16 tids, int nframes, + enum ieee80211_frame_release_type reason, + bool more_data); + +/* internal */ +void mt76_tx_free(struct mt76_dev *dev); +void mt76_put_txwi(struct mt76_dev *dev, struct mt76_txwi_cache *t); +void mt76_rx_complete(struct mt76_dev *dev, enum mt76_rxq_id q); + +#endif diff --git a/drivers/net/wireless/mediatek/mt76/trace.c b/drivers/net/wireless/mediatek/mt76/trace.c new file mode 100644 index 0000000..885a6ca --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/trace.c @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> + +#ifndef __CHECKER__ +#define CREATE_TRACE_POINTS +#include "trace.h" + +#endif diff --git a/drivers/net/wireless/mediatek/mt76/trace.h b/drivers/net/wireless/mediatek/mt76/trace.h new file mode 100644 index 0000000..f5b8048 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/trace.h @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#if !defined(__MT76_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) +#define __MT76_TRACE_H + +#include <linux/tracepoint.h> +#include "mt76.h" + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mt76 + +#define MAXNAME 32 +#define DEV_ENTRY __array(char, wiphy_name, 32) +#define DEV_ASSIGN strlcpy(__entry->wiphy_name, wiphy_name(dev->hw->wiphy), MAXNAME) +#define DEV_PR_FMT "%s" +#define DEV_PR_ARG __entry->wiphy_name + +#define REG_ENTRY __field(u32, reg) __field(u32, val) +#define REG_ASSIGN __entry->reg = reg; __entry->val = val +#define REG_PR_FMT " %04x=%08x" +#define REG_PR_ARG __entry->reg, __entry->val + +DECLARE_EVENT_CLASS(dev_reg_evt, + TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val), + TP_ARGS(dev, reg, val), + TP_STRUCT__entry( + DEV_ENTRY + REG_ENTRY + ), + TP_fast_assign( + DEV_ASSIGN; + REG_ASSIGN; + ), + TP_printk( + DEV_PR_FMT REG_PR_FMT, + DEV_PR_ARG, REG_PR_ARG + ) +); + +DEFINE_EVENT(dev_reg_evt, reg_read, + TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val), + TP_ARGS(dev, reg, val) +); + +DEFINE_EVENT(dev_reg_evt, reg_write, + TP_PROTO(struct mt76_dev *dev, u32 reg, u32 val), + TP_ARGS(dev, reg, val) +); + +#endif + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace + +#include <trace/define_trace.h> diff --git a/drivers/net/wireless/mediatek/mt76/tx.c b/drivers/net/wireless/mediatek/mt76/tx.c new file mode 100644 index 0000000..382ea13 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/tx.c @@ -0,0 +1,499 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "mt76.h" + +static struct mt76_txwi_cache * +mt76_alloc_txwi(struct mt76_dev *dev) +{ + struct mt76_txwi_cache *t; + dma_addr_t addr; + int size; + + size = (sizeof(*t) + L1_CACHE_BYTES - 1) & ~(L1_CACHE_BYTES - 1); + t = devm_kzalloc(dev->dev, size, GFP_ATOMIC); + if (!t) + return NULL; + + addr = dma_map_single(dev->dev, &t->txwi, sizeof(t->txwi), DMA_TO_DEVICE); + t->dma_addr = addr; + + return t; +} + +static struct mt76_txwi_cache * +__mt76_get_txwi(struct mt76_dev *dev) +{ + struct mt76_txwi_cache *t = NULL; + + spin_lock_bh(&dev->lock); + if (!list_empty(&dev->txwi_cache)) { + t = list_first_entry(&dev->txwi_cache, struct mt76_txwi_cache, + list); + list_del(&t->list); + } + spin_unlock_bh(&dev->lock); + + return t; +} + +static struct mt76_txwi_cache * +mt76_get_txwi(struct mt76_dev *dev) +{ + struct mt76_txwi_cache *t = __mt76_get_txwi(dev); + + if (t) + return t; + + return mt76_alloc_txwi(dev); +} + +void +mt76_put_txwi(struct mt76_dev *dev, struct mt76_txwi_cache *t) +{ + if (!t) + return; + + spin_lock_bh(&dev->lock); + list_add(&t->list, &dev->txwi_cache); + spin_unlock_bh(&dev->lock); +} + +void mt76_tx_free(struct mt76_dev *dev) +{ + struct mt76_txwi_cache *t; + + while ((t = __mt76_get_txwi(dev)) != NULL) + dma_unmap_single(dev->dev, t->dma_addr, sizeof(t->txwi), + DMA_TO_DEVICE); +} + +static int +mt76_txq_get_qid(struct ieee80211_txq *txq) +{ + if (!txq->sta) + return MT_TXQ_BE; + + return txq->ac; +} + +int mt76_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q, + struct sk_buff *skb, struct mt76_wcid *wcid, + struct ieee80211_sta *sta) +{ + struct mt76_queue_entry e; + struct mt76_txwi_cache *t; + struct mt76_queue_buf buf[32]; + struct sk_buff *iter; + dma_addr_t addr; + int len; + u32 tx_info = 0; + int n, ret; + + t = mt76_get_txwi(dev); + if (!t) { + ieee80211_free_txskb(dev->hw, skb); + return -ENOMEM; + } + + dma_sync_single_for_cpu(dev->dev, t->dma_addr, sizeof(t->txwi), + DMA_TO_DEVICE); + ret = dev->drv->tx_prepare_skb(dev, &t->txwi, skb, q, wcid, sta, + &tx_info); + dma_sync_single_for_device(dev->dev, t->dma_addr, sizeof(t->txwi), + DMA_TO_DEVICE); + if (ret < 0) + goto free; + + len = skb->len - skb->data_len; + addr = dma_map_single(dev->dev, skb->data, len, DMA_TO_DEVICE); + if (dma_mapping_error(dev->dev, addr)) { + ret = -ENOMEM; + goto free; + } + + n = 0; + buf[n].addr = t->dma_addr; + buf[n++].len = dev->drv->txwi_size; + buf[n].addr = addr; + buf[n++].len = len; + + skb_walk_frags(skb, iter) { + if (n == ARRAY_SIZE(buf)) + goto unmap; + + addr = dma_map_single(dev->dev, iter->data, iter->len, DMA_TO_DEVICE); + if (dma_mapping_error(dev->dev, addr)) + goto unmap; + + buf[n].addr = addr; + buf[n++].len = iter->len; + } + + if (q->queued + (n + 1) / 2 >= q->ndesc) + goto unmap; + + return dev->queue_ops->add_buf(dev, q, buf, n, tx_info, skb, t); + +unmap: + ret = -ENOMEM; + for (n--; n > 0; n--) + dma_unmap_single(dev->dev, buf[n].addr, buf[n].len, DMA_TO_DEVICE); + +free: + e.skb = skb; + e.txwi = t; + dev->drv->tx_complete_skb(dev, q, &e, true); + mt76_put_txwi(dev, t); + return ret; +} +EXPORT_SYMBOL_GPL(mt76_tx_queue_skb); + +void +mt76_tx(struct mt76_dev *dev, struct ieee80211_sta *sta, + struct mt76_wcid *wcid, struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct mt76_queue *q; + int qid = skb_get_queue_mapping(skb); + + if (WARN_ON(qid >= MT_TXQ_PSD)) { + qid = MT_TXQ_BE; + skb_set_queue_mapping(skb, qid); + } + + if (!wcid->tx_rate_set) + ieee80211_get_tx_rates(info->control.vif, sta, skb, + info->control.rates, 1); + + q = &dev->q_tx[qid]; + + spin_lock_bh(&q->lock); + mt76_tx_queue_skb(dev, q, skb, wcid, sta); + dev->queue_ops->kick(dev, q); + + if (q->queued > q->ndesc - 8) + ieee80211_stop_queue(dev->hw, skb_get_queue_mapping(skb)); + spin_unlock_bh(&q->lock); +} +EXPORT_SYMBOL_GPL(mt76_tx); + +static struct sk_buff * +mt76_txq_dequeue(struct mt76_dev *dev, struct mt76_txq *mtxq, bool ps) +{ + struct ieee80211_txq *txq = mtxq_to_txq(mtxq); + struct sk_buff *skb; + + skb = skb_dequeue(&mtxq->retry_q); + if (skb) { + u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK; + + if (ps && skb_queue_empty(&mtxq->retry_q)); + ieee80211_sta_set_buffered(txq->sta, tid, false); + + return skb; + } + + skb = ieee80211_tx_dequeue(dev->hw, txq); + if (!skb) + return NULL; + + return skb; +} + +static void +mt76_check_agg_ssn(struct mt76_txq *mtxq, struct sk_buff *skb) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + + if (!ieee80211_is_data_qos(hdr->frame_control)) + return; + + mtxq->agg_ssn = le16_to_cpu(hdr->seq_ctrl) + 0x10; +} + +static void +mt76_queue_ps_skb(struct mt76_dev *dev, struct ieee80211_sta *sta, + struct sk_buff *skb, bool last) +{ + struct mt76_wcid *wcid = (struct mt76_wcid *) sta->drv_priv; + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct mt76_queue *hwq = &dev->q_tx[MT_TXQ_PSD]; + + info->control.flags |= IEEE80211_TX_CTRL_PS_RESPONSE; + if (last) + info->flags |= IEEE80211_TX_STATUS_EOSP; + + mt76_skb_set_moredata(skb, !last); + mt76_tx_queue_skb(dev, hwq, skb, wcid, sta); +} + +void +mt76_release_buffered_frames(struct ieee80211_hw *hw, struct ieee80211_sta *sta, + u16 tids, int nframes, + enum ieee80211_frame_release_type reason, + bool more_data) +{ + struct mt76_dev *dev = hw->priv; + struct sk_buff *last_skb = NULL; + struct mt76_queue *hwq = &dev->q_tx[MT_TXQ_PSD]; + int i; + + for (i = 0; tids && nframes; i++, tids >>= 1) { + struct ieee80211_txq *txq = sta->txq[i]; + struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv; + struct sk_buff *skb; + + if (!(tids & 1)) + continue; + + do { + skb = mt76_txq_dequeue(dev, mtxq, true); + if (!skb) + break; + + if (mtxq->aggr) + mt76_check_agg_ssn(mtxq, skb); + + nframes--; + if (last_skb) + mt76_queue_ps_skb(dev, sta, last_skb, false); + + last_skb = skb; + } while (nframes); + } + + if (!last_skb) + return; + + mt76_queue_ps_skb(dev, sta, last_skb, true); + dev->queue_ops->kick(dev, hwq); +} +EXPORT_SYMBOL_GPL(mt76_release_buffered_frames); + +static int +mt76_txq_send_burst(struct mt76_dev *dev, struct mt76_queue *hwq, + struct mt76_txq *mtxq, bool *empty) +{ + struct ieee80211_txq *txq = mtxq_to_txq(mtxq); + struct ieee80211_tx_info *info; + struct mt76_wcid *wcid = mtxq->wcid; + struct sk_buff *skb = NULL; + int n_frames = 1, limit; + struct ieee80211_tx_rate tx_rate; + bool ampdu; + bool probe; + int idx; + + skb = mt76_txq_dequeue(dev, mtxq, false); + if (!skb) { + *empty = true; + return 0; + } + + info = IEEE80211_SKB_CB(skb); + if (!wcid->tx_rate_set) + ieee80211_get_tx_rates(txq->vif, txq->sta, skb, + info->control.rates, 1); + tx_rate = info->control.rates[0]; + + probe = (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE); + ampdu = IEEE80211_SKB_CB(skb)->flags & IEEE80211_TX_CTL_AMPDU; + limit = ampdu ? 16 : 3; + + if (ampdu) + mt76_check_agg_ssn(mtxq, skb); + + idx = mt76_tx_queue_skb(dev, hwq, skb, wcid, txq->sta); + + if (idx < 0) + return idx; + + do { + bool cur_ampdu; + + if (probe) + break; + + skb = mt76_txq_dequeue(dev, mtxq, false); + if (!skb) { + *empty = true; + break; + } + + cur_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; + + if (ampdu != cur_ampdu || + (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) { + skb_queue_tail(&mtxq->retry_q, skb); + break; + } + + info = IEEE80211_SKB_CB(skb); + info->control.rates[0] = tx_rate; + + if (cur_ampdu) + mt76_check_agg_ssn(mtxq, skb); + + idx = mt76_tx_queue_skb(dev, hwq, skb, wcid, txq->sta); + if (idx < 0) + return idx; + + n_frames++; + } while (n_frames < limit); + + if (!probe) { + hwq->swq_queued++; + hwq->entry[idx].schedule = true; + } + + dev->queue_ops->kick(dev, hwq); + + return n_frames; +} + +static int +mt76_txq_schedule_list(struct mt76_dev *dev, struct mt76_queue *hwq) +{ + struct mt76_txq *mtxq, *mtxq_last; + int len = 0; + +restart: + mtxq_last = list_last_entry(&hwq->swq, struct mt76_txq, list); + while (!list_empty(&hwq->swq)) { + bool empty = false; + int cur; + + mtxq = list_first_entry(&hwq->swq, struct mt76_txq, list); + if (mtxq->send_bar && mtxq->aggr) { + struct ieee80211_txq *txq = mtxq_to_txq(mtxq); + struct ieee80211_sta *sta = txq->sta; + struct ieee80211_vif *vif = txq->vif; + u16 agg_ssn = mtxq->agg_ssn; + u8 tid = txq->tid; + + mtxq->send_bar = false; + spin_unlock_bh(&hwq->lock); + ieee80211_send_bar(vif, sta->addr, tid, agg_ssn); + spin_lock_bh(&hwq->lock); + goto restart; + } + + list_del_init(&mtxq->list); + + cur = mt76_txq_send_burst(dev, hwq, mtxq, &empty); + if (!empty) + list_add_tail(&mtxq->list, &hwq->swq); + + if (cur < 0) + return cur; + + len += cur; + + if (mtxq == mtxq_last) + break; + } + + return len; +} + +void mt76_txq_schedule(struct mt76_dev *dev, struct mt76_queue *hwq) +{ + int len; + + if (test_bit(MT76_SCANNING, &dev->state) || + test_bit(MT76_RESET, &dev->state)) + return; + + do { + if (hwq->swq_queued >= 4 || list_empty(&hwq->swq)) + break; + + len = mt76_txq_schedule_list(dev, hwq); + } while (len > 0); +} +EXPORT_SYMBOL_GPL(mt76_txq_schedule); + +void mt76_txq_schedule_all(struct mt76_dev *dev) +{ + int i; + + for (i = 0; i <= MT_TXQ_BK; i++) + mt76_txq_schedule(dev, &dev->q_tx[i]); +} +EXPORT_SYMBOL_GPL(mt76_txq_schedule_all); + +void mt76_stop_tx_queues(struct mt76_dev *dev, struct ieee80211_sta *sta, + bool send_bar) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(sta->txq); i++) { + struct ieee80211_txq *txq = sta->txq[i]; + struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv; + + spin_lock_bh(&mtxq->hwq->lock); + mtxq->send_bar = mtxq->aggr && send_bar; + if (!list_empty(&mtxq->list)) + list_del_init(&mtxq->list); + spin_unlock_bh(&mtxq->hwq->lock); + } +} +EXPORT_SYMBOL_GPL(mt76_stop_tx_queues); + +void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq) +{ + struct mt76_dev *dev = hw->priv; + struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv; + struct mt76_queue *hwq = mtxq->hwq; + + spin_lock_bh(&hwq->lock); + if (list_empty(&mtxq->list)) + list_add_tail(&mtxq->list, &hwq->swq); + mt76_txq_schedule(dev, hwq); + spin_unlock_bh(&hwq->lock); +} +EXPORT_SYMBOL_GPL(mt76_wake_tx_queue); + +void mt76_txq_remove(struct mt76_dev *dev, struct ieee80211_txq *txq) +{ + struct mt76_txq *mtxq; + struct mt76_queue *hwq; + struct sk_buff *skb; + + if (!txq) + return; + + mtxq = (struct mt76_txq *) txq->drv_priv; + hwq = mtxq->hwq; + + spin_lock_bh(&hwq->lock); + if (!list_empty(&mtxq->list)) + list_del(&mtxq->list); + spin_unlock_bh(&hwq->lock); + + while ((skb = skb_dequeue(&mtxq->retry_q)) != NULL) + ieee80211_free_txskb(dev->hw, skb); +} +EXPORT_SYMBOL_GPL(mt76_txq_remove); + +void mt76_txq_init(struct mt76_dev *dev, struct ieee80211_txq *txq) +{ + struct mt76_txq *mtxq = (struct mt76_txq *) txq->drv_priv; + + INIT_LIST_HEAD(&mtxq->list); + skb_queue_head_init(&mtxq->retry_q); + + mtxq->hwq = &dev->q_tx[mt76_txq_get_qid(txq)]; +} +EXPORT_SYMBOL_GPL(mt76_txq_init); diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c new file mode 100644 index 0000000..b82b8a2 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/util.c @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include "mt76.h" + +void mt76_remove_hdr_pad(struct sk_buff *skb) +{ + int len = ieee80211_get_hdrlen_from_skb(skb); + memmove(skb->data + 2, skb->data, len); + skb_pull(skb, 2); +} +EXPORT_SYMBOL_GPL(mt76_remove_hdr_pad); + +int mt76_insert_hdr_pad(struct sk_buff *skb) +{ + int len = ieee80211_get_hdrlen_from_skb(skb); + int ret; + + if (len % 4 == 0) + return 0; + + if (skb_headroom(skb) < 2 && + (ret = pskb_expand_head(skb, 2, 0, GFP_ATOMIC)) != 0) + return ret; + + skb_push(skb, 2); + memmove(skb->data, skb->data + 2, len); + + skb->data[len] = 0; + skb->data[len + 1] = 0; + return 2; +} +EXPORT_SYMBOL_GPL(mt76_insert_hdr_pad); + +bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, + int timeout) +{ + u32 cur; + + timeout /= 10; + do { + cur = dev->bus->rr(dev, offset) & mask; + if (cur == val) + return true; + + udelay(10); + } while (timeout-- > 0); + + return false; +} +EXPORT_SYMBOL_GPL(__mt76_poll); + +bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val, + int timeout) +{ + u32 cur; + + timeout /= 10; + do { + cur = dev->bus->rr(dev, offset) & mask; + if (cur == val) + return true; + + msleep(10); + } while (timeout-- > 0); + + return false; +} +EXPORT_SYMBOL_GPL(__mt76_poll_msec); + +int mt76_wcid_alloc(unsigned long *mask, int size) +{ + int i, idx = 0, cur; + + for (i = 0; i < size / BITS_PER_LONG; i++) { + idx = ffs(~mask[i]); + if (!idx) + continue; + + idx--; + cur = i * BITS_PER_LONG + idx; + if (cur >= size) + break; + + mask[i] |= BIT(idx); + return cur; + } + + return -1; +} +EXPORT_SYMBOL_GPL(mt76_wcid_alloc); + +MODULE_LICENSE("GPL"); diff --git a/drivers/net/wireless/mediatek/mt76/util.h b/drivers/net/wireless/mediatek/mt76/util.h new file mode 100644 index 0000000..8514573 --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/util.h @@ -0,0 +1,104 @@ +/* + * Copyright (C) 2016 Felix Fietkau <[email protected]> + * Copyright (C) 2004 - 2009 Ivo van Doorn <[email protected]> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __MT76_UTIL_H +#define __MT76_UTIL_H + +#include <linux/skbuff.h> +#include <linux/bitops.h> + +#ifndef GENMASK +#define GENMASK(h, l) (((U32_C(1) << ((h) - (l) + 1)) - 1) << (l)) +#endif + + +/* + * Power of two check, this will check + * if the mask that has been given contains and contiguous set of bits. + * Note that we cannot use the is_power_of_2() function since this + * check must be done at compile-time. + */ +#define is_power_of_two(x) ( !((x) & ((x)-1)) ) +#define low_bit_mask(x) ( ((x)-1) & ~(x) ) +#define is_valid_mask(x) is_power_of_two(1LU + (x) + low_bit_mask(x)) + +/* + * Macros to find first set bit in a variable. + * These macros behave the same as the __ffs() functions but + * the most important difference that this is done during + * compile-time rather then run-time. + */ +#define compile_ffs2(__x) \ + __builtin_choose_expr(((__x) & 0x1), 0, 1) + +#define compile_ffs4(__x) \ + __builtin_choose_expr(((__x) & 0x3), \ + (compile_ffs2((__x))), \ + (compile_ffs2((__x) >> 2) + 2)) + +#define compile_ffs8(__x) \ + __builtin_choose_expr(((__x) & 0xf), \ + (compile_ffs4((__x))), \ + (compile_ffs4((__x) >> 4) + 4)) + +#define compile_ffs16(__x) \ + __builtin_choose_expr(((__x) & 0xff), \ + (compile_ffs8((__x))), \ + (compile_ffs8((__x) >> 8) + 8)) + +#define compile_ffs32(__x) \ + __builtin_choose_expr(((__x) & 0xffff), \ + (compile_ffs16((__x))), \ + (compile_ffs16((__x) >> 16) + 16)) + + +/* + * This macro will check the requirements for the FIELD{8,16,32} macros + * The mask should be a constant non-zero contiguous set of bits which + * does not exceed the given typelimit. + */ +#define FIELD_CHECK(__mask) \ + BUILD_BUG_ON(!(__mask) || !is_valid_mask(__mask)) + +#define MT76_SET(_mask, _val) \ + ({ FIELD_CHECK(_mask); (((u32) (_val)) << compile_ffs32(_mask)) & _mask; }) + +#define MT76_GET(_mask, _val) \ + ({ FIELD_CHECK(_mask); (u32) (((_val) & _mask) >> compile_ffs32(_mask)); }) + +#define MT76_INCR(_var, _size) \ + _var = (((_var) + 1) % _size) + +int mt76_insert_hdr_pad(struct sk_buff *skb); +void mt76_remove_hdr_pad(struct sk_buff *skb); +int mt76_wcid_alloc(unsigned long *mask, int size); + +static inline void +mt76_wcid_free(unsigned long *mask, int idx) +{ + mask[idx / BITS_PER_LONG] &= ~BIT(idx % BITS_PER_LONG); +} + +static inline void +mt76_skb_set_moredata(struct sk_buff *skb, bool enable) +{ + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; + + if (enable) + hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); + else + hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); +} + +#endif -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
